The church has always been faced by heretical teachings. This article introduces Marcion and his heresy that attacked Scripture. It also considers how this relates to the church today.

Kaiser reflects on the old teaching that sees the Old and New Testaments at odds with each other, as if the God of the Old Testament is different from the God of the New Testament. He refers in particular to Marcion who degraded the Old Testament and denied the unity of the teaching between the two testaments.

This article is about Tertullian (c. 160 to 240 A.D.). His relation to Marcion and Montanus (Montanism) is also mentioned. His importance for apologetics, and to show that Jesus Christ is God and man, is also discussed.

This is an article about Marcion, one of the heretics in the second century AD. He had a view on Scripture that is unfortunately also held by many people today. In a certain sense we can call him the father of Biblical criticism.